Thermo Scientific™ Sulphanilic acid ≥99%

Sulfanilic Acid (4-aminobenzenesulfonic acid) is a crystalline, zwitterionic compound widely used in dye manufacturing, analytical chemistry, azo dye synthesis, and environmental testing. It serves as an intermediate in the production of dyes and optical brighteners and is a primary diazotization substrate for coupling reactions.

This high-purity, off-white to beige solid offered by Thermo Scientific™ Chemicals is ideal for research, industrial synthesis, and educational use. It is also employed as a standard reagent in nitrate determination via the diazotization method, and in sulfonation reactions for organic synthesis.

Key Features & Benefits

• High Purity (≥99%)
  Ensures reproducibility in colorimetric, analytical, and synthetic applications.
• Versatile Diazotizable Compound
  Reacts with nitrite to form diazonium salts for azo dye synthesis and analytical detection.
• Intermediate for Dye and Pigment Synthesis
  Used in production of methyl orange and other pH indicators or acid dyes.
• Analytical Reagent
  Standard component for nitrate/nitrite quantification in environmental and food testing.
• Stable Zwitterion
  Provides good water solubility and crystalline handling properties.

Chemical Identity & Properties

Applications & Uses

• Analytical Chemistry
  • Diazotization reagent for colorimetric detection of nitrates and nitrites
  • Standard for water quality and food safety assays
• Dye & Pigment Synthesis
  • Intermediate for azo dyes such as methyl orange and acid orange
  • Used in formulation of optical brighteners and colorants
• Organic Synthesis
  • Starting material for sulfonation and diazonium salt formation
  • Reacts with phenols and amines in coupling reactions
• Educational Chemistry
  • Demonstrations of diazotization and azo dye formation in teaching laboratories

Safety & Handling

• Storage:
  Store tightly sealed in a dry, ventilated area away from incompatible materials such as strong oxidizers.
• Handling:
  Use personal protective equipment (gloves, goggles, lab coat); avoid inhalation of dust or direct contact.
• Use Restrictions:
  For Research Use Only. Not for human or veterinary use.

Thermo Scientific™ Sulfanilic Acid (99%) is a dependable, research-grade compound used across analytical chemistry, azo dye production, and environmental testing. Its high purity and stable structure make it suitable for a wide range of academic, industrial, and environmental applications.